Front grille for an automobile



FIG. 1 is a front perspective view of a front grille for an automobile showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right-side view thereof; and,

FIG. 4 is a top view thereof.

The rear view is not part of the claimed design. 

The ornamental design for a front grille for an automobile, as shown and described. 